BIO224A CARDIO NOTES Flashcards
1
Q
Cardiac action potential plateau phase is also
A
Contractile cells
2
Q
Cardiac action potential plateau phase ( phases)
A
- Rapid depolarization
- Initial repolarization phase
- Plateau phase
- Repolarization phase
3
Q
Rapid depolorization
A
-Na+(sodium) active and Na+ ( Sodium) enters
- Rapid depolarization
4
Q
Initial repolarization phase
A
- Na+ channel inactivated
- Some K+ channels open and leakout
5
Q
Plateau phase
A
- Ca2+ ( Calcium ions)
- Ca2+ enters
- K+ exit
6
Q
Repolarization phase
A
- Na+ and Ca2+ channel close
- K+ continue to exit
- Cause repolorization
7
Q
cardiac cycle
A
- ventricular filling
- Isovolumetric contraction
- ventricular ejection
- Isovolumetric relax
8
Q
Ventricualr filling phase Pressure
A
- Aortic pressure low as blood enters systemic circuit
- Atrial pressure remain low than ventricular pressure
9
Q
Isovolumetric contraction pressure
A
- Ventricular pressure high until equal aortic pressure
- Ventricular pressure high atrial causing mitral valve close
10
Q
Ventricular ejection phase pressure
A
- Vent. pressure high aortic pressure ( Aortic valve open)
- Atrial pressure high ( Atria will fill w/blood)
11
Q
Isovolumetric relax pressure
A
- Vent. pressure low aortic pressure, Aortic valve to CLOSE
- Vent. pressure low aortic pressure, mitral valve OPEN
12
Q
Right heart valve
A
Tricuspid valve
13
Q
Left heart valve
A
Mitral/ bi valve
14
Q
Right side
A
Body to lungs
15
Q
Left side
A
lungs to body
